CHS 508×12.5
Circular hollow sections from Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1.
Outline drawn from the published dimensions. Fillets and root radii are not shown.
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness, t | 12.5 mm | 0.492126 in |
| Outside diameter | 508 mm | 20 in |
| Inside diameter | 483 mm | 19.0157 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 598,000,000 mm⁴ | 1,436.701 in⁴ |
| Elastic modulus, Sₓ | 2,350,000 mm³ | 143.4058 in³ |
| Plastic modulus, Zₓ | 3,070,000 mm³ | 187.3429 in³ |
| Radius of gyration, rₓ | 175 mm | 6.8898 in |
| Distance to top fibre | 254 mm | 10 in |
| Distance to bottom fibre | 254 mm | 10 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 598,000,000 mm⁴ | 1,436.701 in⁴ |
| Elastic modulus, S_y | 2,350,000 mm³ | 143.4058 in³ |
| Plastic modulus, Z_y | 3,070,000 mm³ | 187.3429 in³ |
| Radius of gyration, r_y | 175 mm | 6.8898 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 1.20000e+9 mm⁴ | 2,883.012 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 153 kg/m | 102.8113 lb/ft |